objects not showing up in render 2.9
Sorry - I've overlooked which version of Blender you're using. I'll leave the answer here in case any of it still applies.

You haven't accidentally clicked on those camera icons in the Outliner, and made the objects unrenderable?  If so, click again on the camera icon.
Or made the lights unrenderable? If so, click again on the camera icon. Another possibility with lighting is the lamps could be too far away. Or they could be in another layer to the objects and you might have accidentally clicked &quot;this layer only&quot; on the lights.
Or put materials on the objects while in Blender Render, and then tried to render in Cycles?  If so, stick to Blender Render, or assign materials in Cycles if you want to render in that.